[coreboot] Does ChromeOS-EC have to boot ChromeOS?

[Zheng Bao]

https://chromium.googlesource.com/chromiumos/platform/ec

Hi, Stafan & All,
I am trying to build a platform which uses AMD APU + EC.

My goal is let EC 
1. give the power sequencing logic to APU
2. play as a generic EC which has features like keyboard, UART.

Currently, I don't have plan to boot chrome OS yet.

So I need you guys give me some advice. 
Does chromeOS-EC meet my requirement?
Is it OK if I don't boot chromeOS? Is chromeOS-EC hard to master?

Zheng